Dewar cryopumping using barium oxide composite for moisture remo

Details Dewar cryopumping using barium oxide composite for moisture remo Dewar cryopumping using barium oxide composite for moisture remo

1988-10-20

1989-12-12

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

62 513, G01J 506

Patent

active

048862401

ABSTRACT:
A non-evacuated dewar 10 advantageously employs a molecular sieve 30 that serves to adsorb gasses in the dewar when cooled during operation of the detector 24 thereby preventing liquid formation onto the detector. The effects of outgassing and permeation during storage are substantially eliminated because the dewar package is in partial pressure equilibrium with its environment since the interior of the dewar is backfilled with the same inert gas as is in the surrounding outside environment. A desiccant 40 made of a barium oxide/RTV silicone rubber composite may be used to adsorb moisture which may permeate into the housing.

REFERENCES:
patent: 4474036 (1984-10-01), Ball et al.
patent: 4719353 (1988-01-01), Peck, Jr. et al.

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